Question

【题目】Nobody knows whether books _____ by the Internet in the future

A. will be replacedB. were replaced

C. replacedD. replace

Answer 1

【答案】A

【解析】

句意：没有人知道在未来书是否会被取代。根据主语books和replace之间是被动关系，所以用被动语态，排除C/D；根据in the future可知是将来时态；故选A。